i have no code for my radio cassette?

i have a vauxhall astra w reg and do not have a code for the radio cassette that came installed in it. i need the code but have been quite unable to log into any of the advisors to ask this question of how to regain the code. the number on the casing is, as far as i can ascertain gm 0400x2448674----there are also two ,what appear to be bar code numbers on the paper manufacturers label which are 9022 213 96752 04----- and 003 9927 2448674 i hope you can help me with this as i am lost without my cassette music. THE RADIO IS A PHILIPS CAR 400 2F3 it also has another number wa049927